11555151555555 has 24 divisors (see below), whose sum is σ = 21083083541520. Its totient is φ = 5838392364480.

The previous prime is 11555151555553. The next prime is 11555151555557. The reversal of 11555151555555 is 55555515155511.

11555151555555 is a `hidden beast` number, since 1 + 15 + 5 + 5 + 15 + 15 + 55 + 555 = 666.

It is an interprime number because it is at equal distance from previous prime (11555151555553) and next prime (11555151555557).

It is not a de Polignac number, because 11555151555555 - 2¹ = 11555151555553 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11555151555553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6757397716 + ... + 6757399425.

It is an arithmetic number, because the mean of its divisors is an integer number (878461814230).

Almost surely, 2^{11555151555555} is an apocalyptic number.

11555151555555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11555151555555 is a deficient number, since it is larger than the sum of its proper divisors (9527931985965).

11555151555555 is a wasteful number, since it uses less digits than its factorization.

11555151555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13514797171 (or 13514797168 counting only the distinct ones).

The product of its digits is 9765625, while the sum is 54.

The spelling of 11555151555555 in words is "eleven trillion, five hundred fifty-five billion, one hundred fifty-one million, five hundred fifty-five thousand, five hundred fifty-five".